Clutch



E.' l. TOMLINSON.

CLUTCH.

` vAPPLICATION man Nov. n. 191e. 1,.,23,797.r Patented Dee. 2,1919.

' e7/eig tocgnneced 4 /6 2 5 m L 5" l l5 v y #I "mila .9 7 /4 l lZz'z'i/y lilp'\ /NM'ENTUR Wu/zd EDV/TARD J'. TOMLENSON, OF NEWARK, NEW' JERSEY, ASSIGNOR TO SPLITDORF ELECTRICAL COMPANY, OF NEWARK, EW JERSEY.

CLUTCH.

Specification of Letters Patent.

Application filed November 11, 1916. Serial No. 130,799.

To all whom t may concern.'

Be it known that 1, EDWARD J. TOMLIN- soN, a citizen of the United States, a resident of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Clutches, of which the 'following is a specification.

'The object of my invention is to produce a clutch which is small and compact, strong and durable, for use in coi'inecting a starting motor to an internal combustion engine.

Heretofore various types of clutches have been used but considerable valuable space has been taken up by such devices. -li/iy clutch, in its preferred form, is adapted to be made into a very small and compact device. A

One of the objects of my invention, in addition to the general object above stated, is to provide a clutch of the so-called self releasing type whereby after the starting motor has cranked the engine, the engine driven member of the clutch will run away from the power motor driven member.

Other and furthe-r objects of inyinvention will ybe apparent to those skilled in the art after a study of the specification and drawings attached hereto.

In' the accompanying drawing Figure 1 illustrates a perspective view of my complete clutch with a portion broken away so a's to show the interior construction thereof.

Fig. 2 is anend elevation of one of the clutch members.

Fig. 3 is a perspective view of one of the pawls shown in Fig. 2.

Fig. t is a modified form of construction of pawl shown in Fig. 3.

As shown in the drawing the clutch consists of certain instrumentalities of which 1 is a sleeve member adapted to be fastened .to the engine shaft.

therefrom through the medium of key t.k

Mounted on the sleeve 1 is an exterior clutch member 5, and as shown in Fig. 2 the clutch rmember 5 is adapted to' carry pawls 6 of which four are shown. To hold the eXterior clutch member 5 in position on the sleeve 1 a lock nut 7 is used. The lock nutv 7 is slotted at 8 and a screw 9 is used to draw the portions of the nut 7 of opposite sides of the s lot 8 together so as to pinch on the screw threads on sleeve 1.,v rThe -clutch menr ber 5 has a square hole 10 therein. The sleeve 1 is square for a short portion of its length, one side of the squarebeing shown at 11, for the'purpose of fitting the square hole 10 iii clutch member 5. The sleeve 1 has a hole 23 which passes all the way through it and the rear end of sleeve 1 is counterbored at 12 to the proper depth, which counterbore is larger than hole 28 and is adapted to fit onto the crank shaft of the engine. In the form shown I prefer to heat the end of sleeve lat the counterbored end l12 so as to enlarge the same then slip this end onto the engine shaft, allowing the sleeve to shrink to the shaft. rl'he front end of sleeve'l .is notched at 22 for the purpose ofvta'king a hand starting crank as is the usual practice.

`The rear endof sleeve 1 has a collar 13 to.

sprocket wheel on the power motor which isl in the majority of cases electric.

In order to lubricate the bearing surface 1-1 between the sleeve 1 and the ratchet gear member 2 1 provide an oil cup 15 of any suitable type whichis mounted on mein-ber 5 and has a passage leading to the interior-.of the clutch. rlfhe ratchet gear 2,1nay have va small hole therethrough adjacent to the oil cup 15 so as `to directly carry the oil through to the bearing surface 14e. 1 have also found that the oil will work along the teeth 16k and passover the end of the ratchet gear member 2 onto the bearing surface 141.

Referring to Fig. 2 it will be noted that the pawls .6 are laid loosely into a recess 17 and transmit the strain directly to the abutments 18 without the medium of any, pins usually used in connection with a pawl and ratchet clutch.

In the operation of my device, current is applied to the starting motor which in turning, through the medium of the chain, power is transmitted to the sprocket wheel 3 which being fastened to the ratchet gear member of the clutch 2 startsv this in rotation against the pawls 6 some of which by gravity will be in position to engage the gear member 2. Motion is thereby transmitted to clutch member 5 and thence to thesleevc 1 and to the engine shaft. Uien the engine Patented Dec. 2, y1919.

y path of movement of the teeth 16 of ratchet u Should it be found necespicks up under its oivn power itdrives the member l faster than the motor driven members 2 and 8 and member 5 carrying the paivls runs away from thesemembers and on account of centrifugal'force the'paivls 6 are throivn into the recesses i7 out of the gear member 2. sary to deaden the soundrof the pave/ls as theyY drop onto the ratchet teeth at lovv speeds of the engine, l may use the modied form of pavvl shown in Fig. ll, which is made' up of punehings lQ'having sound deadening material 2O of leather or other suitable material therebetween and being riveted securely together by means of rivets 21.

t will be readily noted that various other Y modifications and alterationsinay-be made Vse by those skilled iii the art and 'l therefore do not Wish to limit myself to the precise construction of details shown.

Having thus described my inventionivhat kwith a positive driving connection between said gear Wheels, a member yremovably vmounted on said lflat surfaces of said sleeve and extending over tliersleeve toward said flange adjacent to said driving member and A, means carried by the member removably mounted on the flat surfaces of the sleeve `forengaging and disengaging the first mentioned ratchet gear V*Wheel constituting a part of the driving member. j l

In a clutch, the combination of a driven sleeve having a driving member supported on one end thereof, said vdriving member consisting of tvvo gear members one Within.

the other and drivingly secured together, a member drivingly butV removably mounted on thev other end of saidsleeve adjacent to said driving member and having a portion overlapping the teeth of said inner v'gear member and abutting against the outer gear Wheel constituting said driving member,

means'loosely carried by the member removably mounted on the sleeve for engaging and disengaging the teeth on the inner gear member and means on the opposite end of the sleeve from that carrying the removably mounted member for positioning the said gears on the sleeve. A

Y 3. In a clutch, the combination of a sleeve member having a counter-bore at one end, threads cut on the opposite end thereof andl Vflat surfaces formed on the sleevebetvveen the threaded portion and the counterbored portion, an annularring carried by that end of the sleeve over the eounterboredl part,

said ring having teethcut inf its outerperipliery, a gear Wheel Ydrivingly mounted on said annular ring, a member mounted onthe flat surfaces of said sleeve and over-hanging the gear teeth of said annular'ring, pau/ilsY carriedby said member to engage teeth-on` the said annular ring-and av nut to engage said threads on the sleeve for holdingV all of said parts inoperative position.

a. ln a clutch, the combination of an inner sleeve having a counterbore and an upturned flange at one end With threads cut on the sleeve at the other endand fiat. surfaces betvveen the threaded part-.and the'eounterbored part, an annular ring adapted to be mounted 0n the sleeve abutting against said upturned flange said annular ring` having teeth eut on its outer peripher a gear Wheel drivingly carried by said annular ring and f abutting against saidfupturned flange on the sleeve, a member drivingly carried lby the flatsurfaces of said sleeve vand extending over the teeth 'on said annular ringv and vabutting against the said gear Wheel, pavvls carried by this .member for engaging and Vdisengaging the'teeth on said annular ring and means Acarried by said threaded portion of the sleeve for holding all of said members in Working position. Y Y

Y5. ln a clutch, the. combination of a driven sleeve lia-ving drivingV member supported on one end thereof'and having flat surfaces on the other end, said driving member consistingof an internal ratchet gear Wheel andan external gearivheel driviiigly connected, a member drivingly mounted on theV flat surfaces of said sleeve and extending over a part ofthe inner of .said gear Wheels constituting the driving member, saidyover` hangingportion serving to carry means for vengaging the inneroi said gear Wheels and also serving as a housing for said gear vvheel and engaging means, and. means carried by said sleeve for holdingv all of the previously mentioned parts in operative position.

6. ln a clutch, the combination Yofa driv ing and'l a driven member, said driven'niember .consisting of a sleevehavingone end counterbored and an upturned flangeY adjacent the open end of said counterbore and notches at the other end of said )sleeve and a cup shaped member 'drivingly `mounted intermediate thetWo Vends of. said sleeve,

Yme

y.120 Vsaid cup shapedk member having enlarged Y portions on 'its inner periphery thereby' forming recesses, said driving member. con.-

sisting of a ratchet Wheely anda gear Wheel arranged onel Within the :other and vdrivingly connected,both saidfivheels carriedby said sleeve and abutting against the'upi turned flange ofthe sleeve, the said ratchet Wheel projecting beyond lthe plane v'ofthe said gear Wheel :and Within .the said cupy CJi shaped member', pawls adapted to be mounted within the recesses of the cup shaped member and to engage the teeth ofthe ratchet wheel projecting within said cup shaped member for the purpose described.

7. In a clutch, the combination of a driving and a driven member, said driven member consist-ing of a sleeve having ene end counterbored and an upturned flange adjacent the open end of said counter-bore and notches at the other end of said sleeve and a cup shaped member drivingly mounted intermediate the two ends or said sleeve, said cup shaped member having enlarged portions on its inner periphery thereby forming recesses, said driving member consisting of a ratchet wheel and a gear wheel arranged one within the other and drivingly connected, both said wheels carried by said sleeve and abutting against the upturned flange of the sleeve, said ratchet wheel pre- 'ecting beyond the plane et the said gear wheel and within the said cup shaped meniber, pawls adapted to be mounted within the recesses of said cup shaped member for the purpose of engaging the teeth or the inner ratchet wheel of the driving member, said enlarged portions of the inner periphery of the cup shaped member serving as abutinents to transmit the strain directly from the pawls to the cup shaped member for the purpose described.

8. ln a clutch, the combination ot a driving and a driven member, said driven member consisting of a sleeve having one end counterbored and an upturned flange adi jacent the open end of said connterbore and notches at the other end of said sleeve and a cup shaped member drivingly mounted intermediate the two ends of' said sleeve, said cup shaped member having enlarged portions on its inner periphery thereby forming recesses, said driving member consisting of a ratchet wheel and a gear wheel arranged one within the other and drivingly connected, both said wheels carried by said sleeve and abutting against the upturned flange of the sleeve, said ratchet wheel projecting beyond the plane of the said gear wheel and within the said cup shaped member, pawls adapted to be mounted within the recesses of said cup shaped member for the purpose of engaging the teeth of the inner ratchet wheel of the driving member, said enlarged portions of the inner periphery of the cup shaped member serving` as abutments to transmit the strain directly from the pawls to the cup shaped member, and means carried by said pawls for the purpose of producing noiseless operation of the same as they pass over the ceperating teeth of the ratchet wheel, substantially as described.

9. n a clutch, a unitary structure consisting of a driven sleeve having an upturned flange at one end thereof and having flat surfaces on the other end and carrying a driving member adjacent to said flange, said driving member being composed of a ratchet wheel and a gear wheel, one within t-he other and securely fastened together, the inner ratchet wheel having its teeth projecting longitudinally of the sleeve beyond the plane of the outer .gear Wheel, pawls adapted to vengage said inner gear wheel and a member for carrying said pawls mounted on the fiat surfaces of said sleeve and projecting over the teeth of the inner ratchet wheel and abutting against the teeth of the outer gear wheel, and means carried vby said sleeve for holding all of the previously mentioned parts in operative position between it and said flange.

In witness whereof I aiiX my signature.

EDVARD J. TOMLNSON. 

